Sleeve valve engine



Oct. 8, 1940. F, NALUNGER 2,217,289

SLEEVE VALVE ENGINE Filed Aug. 13, 1938 fP/ 4 0/0292 r NVENTOR BY ,MQ

.6 ATTORNEY,

Patented Oct. 8, 1940 UNITED STATES PATENT OFFICE Daimler-Benz Aktiengesellschaft,

Stuttgart- Unterturkheim, Germany Application August 13, 1938, Serial No. 224,690 In Germany August 20, 1937 4 Claims.

This invention relates to a sleeve valve combustion engine for light fuels with fuel injection and spark time ignition. One object of the invention is to provide an engine of this kind in which a good mixture distribution in the combustion chamber of the engine is obtained. Another object is to ensure that the spark plug is well situated and ignites in the mixture jet.

'A further object is to produce an arrangement in which the fuel is carried by the air stream into the combustion chamber and is thoroughly mixed and eddied with the air stream. A still further object is to provide a construction in I which the rapidly moving fuel is prevented from striking against the delicate edges of the intake openings in the cylinder and sleeve valve, and burning away of these edges is avoided.

According to the invention, these and other objects are accomplished by the arrangement and combination of elements set forth in the following detailed description, defined in the appended claims and illustratively exemplified in the accompanying drawing, in which- Fig. 1 is a side section through the cylinder of the internal combustion engine taken on line XX of Fig. 2 and Fig. 2 is a horizontal section taken on line Y-Y of Fig. 1.

The internal combustion engine comprises a cylinder a, a cylinder head b, a sleeve valve 0 and a piston d.

The cylinder a has admission ports e1, e2, ea and exhaust ports I, the admission ports being distributed over one half of the cylinder periphery and connected to a common suction pipe e. A spark plug 9 is disposed eccentrically in the cylinder head b at a distance from all the inlet slots e1, ez, es exceeding the cylinder radius. The sleeve valve 0 in which the piston d moves, is guided between the wall of the cylinder at and the cylinder head b. This sleeve valve 0, which is actuated for example with a corresponding gear ratio of transmission by the crank shaft,

e4, e5, es, and the outflow slots ii, are brought I into communicationwith the corresponding admission ports e1, e2, c3 and exhaust ports 1 re-' spectively in the cylinder a.

As shown, the admission ports e4, e5, ea of the sleeve valve register with the slots e1, 62, ea in the cylinder during part of a downward stroke of the piston 11, and simultaneously, fuel is ejected from the nozzle 2'.

The injection .nozzle i is arranged in the in-' duction pipe e near the admission port 82 in such a manner that the fuel is injected into the interior of the cylinder a through the inflow slot e5. Instead of one injection nozzle i also two injection nozzles 21 and i2 may be arranged lat- 5 erally of the induction passage, the fuel being then injected into the combustion chamber it through the inflow slots e4, es.

Having now particularly described and ascertained the nature of my said invention and in 10 what manner the same is to be performed, I declare that what I claim is:

1. In an internal combustion engine, the combination with a cylinder having an inlet slot, a piston movable in said cylinder, an air suction 16 pipe leading to said inlet slot, and a sleeve valve slidable in said cylinder and relative to said pis-. ton, said sleeve valve being provided with an admission port, of a fuel injection nozzle disposed in said suction pipe, said nozzle having an outlet 20 opening with a cross-section substantially smaller than thatof said slot and projecting substantially radially and at right angles to the cylinder axis into said slot to a point adjacent the plane defined by the inner cylinder wall, means to bring 25 said admission port into register with said inlet slot during at least part of a downward stroke of the piston, and means to eject fuel from said nozzle opening while said admission port is in register with said inlet slot. 0

2. A device, as claimed in claim 1, comprising further a spark plug disposed eccentrically in said cylinder at a distance from said nozzle exceeding the cylinder radius.

3. In an internal combustion engine, the com- 5 bination with a cylinder having a plurality of inlet slots distributed over one half of the cylinder periphery, a piston movable in said cylinder, an air suction manifold leading to said inlet slots, and a sleeve valve slidable in said cylinder relative to said piston, said sleeve being provided with a plurality of admission ports corresponding to said inlet slots, of a fuel injection nozzle disposed in said manifold, said nozzle projecting substantially radially and at right angles to the 45 cylinder axis into one of said slots to a point adjacent the plane defined by the inner cylinder wall and having an outlet opening of a crosssection substantially smaller than-that of said slot, a spark plug disposed eccentrically in said 5 cylinder at a distance from all said inlet slots exceeding'the cylinder radius, means to bring said admission ports into register with said inlet slots during at least part of a downward stroke of the piston, and means to eject fuel from said 55 'inlet' slots distributed over one hall! of the cylinderperiphery, a piston mova'ble in said cylinder, an air suction manifold leading to said inlet slots, and a sleeve valve slidable in said cylinder. relative to said piston, said sleeve being provided with a plurality of admission ports corresponding to said inlet slots, of a plurality of fuel injection nozzles disposed in said manifold, each of said nozzles projecting substantially radially and at right angles to the cylinder aids into one' of said slots to apoint adjacent the plane defined by the inner cylinder wall and having an outlet opening of across-section substantially smaller than that of said slot, a spark plug disposed eccentrically in said cylinder at a distance from all said inlet slots exceeding the cylinder radiua' means to bring said admission ports into register withsaid inlet slots during at least part of a downward stroke of the piston, and means to 10 eject fuel from said nozzle openingwhile said admission portsare in register with said inlet slots. v

FRITZ NALLJN GER. 

